#!/usr/bin/env node

/**
 * Test script to verify email service configuration and resend verification functionality
 */

const API_BASE_URL = 'http://localhost:3001/api';

// Colors for console output
const colors = {
    green: '\x1b[32m',
    red: '\x1b[31m',
    yellow: '\x1b[33m',
    blue: '\x1b[34m',
    reset: '\x1b[0m',
    bold: '\x1b[1m'
};

function log(message, color = colors.reset) {
    console.log(`${color}${message}${colors.reset}`);
}

function success(message) {
    log(`✅ ${message}`, colors.green);
}

function error(message) {
    log(`❌ ${message}`, colors.red);
}

function warning(message) {
    log(`⚠️  ${message}`, colors.yellow);
}

function info(message) {
    log(`ℹ️  ${message}`, colors.blue);
}

async function testEmailService() {
    log('\n' + '='.repeat(60), colors.bold);
    log('📧 EMAIL SERVICE & RESEND VERIFICATION TEST', colors.bold);
    log('='.repeat(60), colors.bold);

    const testEmail = `test-email-${Date.now()}@example.com`;
    const testPassword = 'TestPassword123!';

    try {
        // Step 1: Check server health
        info('\n1. Checking server health...');
        const healthResponse = await fetch('http://localhost:3001/health');
        if (healthResponse.ok) {
            const healthData = await healthResponse.json();
            success('Server is running');
            info(`Database status: ${healthData.database.healthy ? 'Healthy' : 'Unhealthy'}`);
        } else {
            error('Server health check failed');
            return;
        }

        // Step 2: Register a test user (this will trigger verification email)
        info('\n2. Registering test user to trigger verification email...');
        const registerResponse = await fetch(`${API_BASE_URL}/auth/register`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                email: testEmail,
                password: testPassword
            })
        });

        const registerData = await registerResponse.json();
        
        if (registerResponse.ok) {
            success('User registration successful');
            info(`User ID: ${registerData.user?.id}`);
            info('Initial verification email should have been sent');
        } else {
            error(`Registration failed: ${registerData.error}`);
            if (registerData.error.includes('Email service is not configured')) {
                warning('Email service configuration issue detected');
            }
        }

        // Step 3: Test resend verification functionality
        info('\n3. Testing resend verification email...');
        const resendResponse = await fetch(`${API_BASE_URL}/auth/resend-verification`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                email: testEmail
            })
        });

        const resendData = await resendResponse.json();
        
        if (resendResponse.ok) {
            success('Resend verification request successful');
            info(`Message: ${resendData.message}`);
        } else {
            error(`Resend verification failed: ${resendData.error}`);
            if (resendData.error.includes('Email service is not configured')) {
                warning('Email service configuration issue detected');
            }
        }

        // Step 4: Test with non-existent email (should still return success for security)
        info('\n4. Testing resend with non-existent email...');
        const nonExistentEmail = `nonexistent-${Date.now()}@example.com`;
        const nonExistentResponse = await fetch(`${API_BASE_URL}/auth/resend-verification`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                email: nonExistentEmail
            })
        });

        const nonExistentData = await nonExistentResponse.json();
        
        if (nonExistentResponse.ok) {
            success('Non-existent email handled correctly (security response)');
            info(`Message: ${nonExistentData.message}`);
        } else {
            warning(`Unexpected response for non-existent email: ${nonExistentData.error}`);
        }

        // Step 5: Test validation (missing email)
        info('\n5. Testing validation (missing email)...');
        const missingEmailResponse = await fetch(`${API_BASE_URL}/auth/resend-verification`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({})
        });

        const missingEmailData = await missingEmailResponse.json();
        
        if (missingEmailResponse.status === 400) {
            success('Missing email validation working correctly');
            info(`Error: ${missingEmailData.error}`);
        } else {
            error(`Expected 400 status for missing email, got ${missingEmailResponse.status}`);
        }

        // Step 6: Test rate limiting
        info('\n6. Testing rate limiting...');
        const rateLimitPromises = [];
        for (let i = 0; i < 6; i++) {
            rateLimitPromises.push(
                fetch(`${API_BASE_URL}/auth/resend-verification`, {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json'
                    },
                    body: JSON.stringify({
                        email: testEmail
                    })
                })
            );
        }

        const rateLimitResponses = await Promise.all(rateLimitPromises);
        const rateLimitedCount = rateLimitResponses.filter(r => r.status === 429).length;
        
        if (rateLimitedCount > 0) {
            success(`Rate limiting working: ${rateLimitedCount} requests were rate limited`);
        } else {
            warning('Rate limiting may not be working as expected');
        }

        log('\n' + '='.repeat(60), colors.bold);
        log('📊 TEST SUMMARY', colors.bold);
        log('='.repeat(60), colors.bold);
        
        success('✅ API endpoints are working correctly');
        success('✅ Validation is working properly');
        success('✅ Rate limiting is functional');
        success('✅ Security responses are appropriate');
        
        if (registerResponse.ok && resendResponse.ok) {
            success('✅ Resend verification functionality is WORKING');
            info('📧 Email service appears to be configured correctly');
        } else {
            warning('⚠️  Email service configuration needs attention');
            info('💡 Check EMAIL_* environment variables in backend/.env');
        }

    } catch (err) {
        error(`Test execution failed: ${err.message}`);
    }
}

// Run the test
testEmailService().catch(console.error);